ALPINESTARS SMX-6 v2 Vented Boots - Black/Yellow - US 9.5 / EU 44 2223017-1550-44 Adventure 890 L 2021/2023 A noise insert is included

A noise insert is included in the package because the open version of the system has no catalytic converter and was developed for use on racetracks or closed courses only

construction and endurance requirements

but are also environmentally friendly

Insert spacer between cylinder and reed valve

Not for rotary top transmissions

ALPINESTARS SMX-6 v2 Vented Boots - Black/Yellow - US 9.5 / EU 44 2223017-1550-44 Adventure 890 L 2021/2023 A noise insert is includedBoot upper incorporates an innovative front and rear bellows and rear calf zone for superior levels of flexibility Boot upper is constructed from microfiber for durability and abrasion resistance Ergonomic forefoot streamlining enables greater control of the bike's controls and provides a superior, wide ranging foot profile for excellent fit and comfort Thermoplastic Polyurethane (TPU) lateral ankle brace provides a biomechanical support between the